Rif Pesachim 15a {Pesachim 46b continues; 48a-b}

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15a

{Pesachim 46b continues}
Rav Chisda said he incurs lashes - we do not say that since if guests visited him, they {=the loaves he baked} would be useful to him, now as well, they are useful to him, and thus he incurs lashes.
And Rabba said he does not incur lashes - we do say "since."

{Pesachim 48a}
And we conclude that they argue in the dispute of Rabbi Eliezer and Rabbi Yehoshua. That Rabba says "since" is like Rabbi Eliezer and Rav Chisda, who said that we do not say "since" is like Rabbi Yehoshua. That Rabbi Eliezer maintains that this challah is the chametz that we are warned against seeing or finding. What is the reason? For we say "since," and if he requires he can gain absolution from it {by having his declaration annulled} and render it non-holy, and this one will be fit for him, at which point he will return and separate a different one {for challah}, now as well is is reckoned as his, and so he is warned regarding it against seeing or finding. And Rabbi Yehoshua maintains that we do not say "since," and therefore this is not the chametz regarding which we were warned against seeing or finding.
And we decide the halacha like Rabbi Eliezer. Therefore the halacha is like Rabba, for he rules like Rabbi Eliezer, in accordance to whom is the halacha.

{Pesachim 48b}
Mishna:
Rabban Gamliel says: Three women may knead at the same time, and then bake in the same oven, one after the other.
And the Sages say: Three women may be engaged in the dough {in different activities} at the same time -- one kneads, one shapes, and one bakes.
Rabbi Akiva says: Not all women are alike, nor are all kinds of wood alike, nor are all ovens alike.
This is the general rule: if it rises, let her wet it with cold water {to retard chimutz}.

Gemara:
Our Mishna deals with three doughs. For Rabban Gamliel maintains that three women begin kneading at once three doughs, and when they reach baking, they bake one after the other, and even though the third waits {the amount of time of} three firings up {of the oven} and two bakings, the dough will become chametz in this measure {of time}. And the Sages say that three women may be engaged in the dough - one kneads initially, and when she begins shaping, her friend begins to knead, and when the first one begins to bake and the second one to shape, the third one begins to knead. Thus all three are engaged in the dough at one time -- one bakes her own, one shapes her own, and one kneads her own. And this is what they we say: It was taught {tna}: Having kneaded, she shapes it and her friend kneads in her place. Having shaped it, she bakes and her friend shapes in her place {Hagahot Chavot Yair: and the third kneads}. Having baked, she kneads and her friend bakes in her place {Hagahot Chavot Yair: and the third shapes}. And so it cycles around. And the entire time that they are engaged